252221555 has 16 divisors (see below), whose sum is σ = 314712000. Its totient is φ = 193818240.

The previous prime is 252221551. The next prime is 252221569. The reversal of 252221555 is 555122252.

It is not a de Polignac number, because 252221555 - 2² = 252221551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (252221551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24485 + ... + 33225.

It is an arithmetic number, because the mean of its divisors is an integer number (19669500).

Almost surely, 2^252221555 is an apocalyptic number.

252221555 is a deficient number, since it is larger than the sum of its proper divisors (62490445).

252221555 is a wasteful number, since it uses less digits than its factorization.

252221555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8974.

The product of its digits is 10000, while the sum is 29.

The square root of 252221555 is about 15881.4846598169. The cubic root of 252221555 is about 631.8210141484.

The spelling of 252221555 in words is "two hundred fifty-two million, two hundred twenty-one thousand, five hundred fifty-five".